MEMS Air Quality Sensor with Integrated Particulate and Gas Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current portable air quality monitoring devices are bulky, complex, costly, and difficult for non-professional users to operate and maintain due to the assembly of multiple macroscopic environmental sensors, which limits their convenience and accessibility for detecting atmospheric particulate and gases.
Innovation Solution
An integrated MEMS device comprising a particulate sensor and gas sensor, fabricated using MEMS technology, which includes a semiconductor-based structure with spacer elements forming a duct for air flow, enabling simultaneous detection of particulate and gases with reduced size, energy consumption, and simplified maintenance through self-cleaning capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple macroscopic environmental sensors are assembled together on an electronic board, then detection capability for particulate and gases is achieved, but device volume and complexity increase
Solution Approach 1:
The patent integrates multiple environmental sensors (particulate sensor, gas sensors for CO, CO2, NO, NO2) into a single portable apparatus, eliminating the need for separate macroscopic sensors and their individual assemblies. This merging reduces device volume while maintaining comprehensive detection capability.
Solution Approach 2:
The portable apparatus is designed to perform multiple detection functions simultaneously - measuring particulate matter and various gas concentrations - within a single integrated device, replacing what would traditionally require multiple specialized sensors and assemblies.
2Measurement precision
If multiple macroscopic environmental sensors are assembled together on an electronic board, then detection capability for particulate and gases is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
By integrating all sensor functions into a single portable apparatus with unified manufacturing processes, the patent eliminates the complex assembly steps required for multiple separate macroscopic sensors, reducing both manufacturing complexity and cost.
3Measurement precision
If multiple macroscopic environmental sensors are assembled together on an electronic board, then detection capability for particulate and gases is achieved, but ease of operation and maintenance deteriorates
Solution Approach 1:
The integration of all sensing functions into a single portable apparatus with unified operation interfaces simplifies user interaction, eliminating the complexity of operating and maintaining multiple separate macroscopic sensors.
4Measurement precision
If multiple macroscopic environmental sensors are assembled together on an electronic board, then detection capability for particulate and gases is achieved, but periodic maintenance requiring manual intervention increases
Solution Approach 1:
The integrated portable apparatus consolidates all sensor maintenance functions into a single system, reducing the number of separate maintenance operations required compared to multiple macroscopic sensors.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The MEMS device provides a compact, energy-efficient solution for monitoring air quality, allowing easy integration into various devices and promoting widespread awareness and adoption of pollution countermeasures, with automatic maintenance and high sensitivity independent of environmental conditions.
Implementation Method 1
a particulate sensor configured to detect particulate in the air
Implementation Method 2
one or more gas sensors configured to detect one or more gases in the air
Data Source
AI summary
A MEMS device for detecting particulate and gases in the air, comprising: a first semiconductor body; a second semiconductor body with a first surface facing a first surface of the first semiconductor body; and a first spacer element and a second spacer element, which extend between the first surfaces of the semiconductor bodies so as to arrange them at a distance apart from one another and define a first duct. The MEMS device further comprises at least one of the following: a first particulate sensor comprising a first emitter unit for generating acoustic waves in the first duct, and a first particulate-detection unit for detecting the particulate, the first emitter unit and the first particulate-detection unit facing one another through the first duct; and a first gas sensor, which faces the first duct and is configured to detect said gases in the air present in the first duct.